Ammunition case



Feb. 19, 1935.. A. DHoM AMMUNITION CASE Filed oct. 2, 1953 zwi PatentedFeb.

sporting ammuniti case 01' anyjmetal or cylindre-conical 5 nating in`its lower PATE-Nr*oF-Fica Application ,october 2, 1933,'seria1 No.V691,854

i I nFranceOctober 8,1932, Y f tolaims. -(o1,rag.51,7) :The inventionrelatesto cases for all kinds of onV andconcernsV a new metal or` metalalloy,- of cylindrical form at its upper part, termi-V part by a sortofV ogive having anaxial neckfor accomodating thecap; The

ase or ogival Dart ofthe case is surmounted by a cylindrical-reinforcementintendedto strengthen the case 1by binding and to carry arim itat` the necessary'places the extraction.

forv

VIn Ya constructional modification, the body o Vthe case isccnstitutedin `the `ordinary :manner b'y, a cardboard Atube,`isnsuitably engageda minating inia` cylindrical neck in whichis en`gaged the cap.

`over .the cardboard, tube 11s naed the@mani the lower part ofwhichspherical or oval case terrein,forcementV whichlpresses it on thespherical or oval case, whileengaging the neck of the` said Theaccompanyingdrawing shows in Figure '1 an axialsectlon" of anall-metalVcase according to the invention, and in Eigure 2 a similar sec,-

t'ion of-a case made of cardboardand metal.

A rReferring to the cases shown `are sporting In Figure 1, the actualcase is preferably made or steeI ana'in the a cylindrical part drawingfaWin be seen that Acartridge-ca'ses.-

1 extended by a spherical or oval partz of-'lesseri length, terminatedbyaneck This case is produced inafsingle piece in steel by knownprocesses, and possessesa greater wall thickness in the ogival partwhich encloses the combustion chamber of the powder, whichv chamber hasto resistconsiderable stresses. The ogival partk 2v is surmounted by acylindricalreinforcement 4 Aprovided with the usual rim 5.vreinforcement 4surmounts of the union of the ogival drical part and atthe place considerable stresses, and

the case inthe region part with the cy1in`` which issubjected to isforcibly fittedV on the case. This reinforcement which is closed in itslower part, is provided ing inwardly turned edges 6, which opening ts onthe neck 3 of the case.

It will also lbe observed that the reinforcement 4 is mounted on aslightly contracted part 21 form an internal Vshoulder 22 as abutmentfor thewad.

ofthe ogival part 2so asV to The case has a variable thicknesscalculated so as to` provide the best conditions of resistanceto` thestresses develo The"prole of the lated to provide th .the said stresses.

ped by the firing of the shot. ogival part is likewise calcueoptimumshape for resisting It -is likewiseV calculated to.

-resistance to the stresses i The'casei being entirely made of `metaland not 20 TheV with an opening hav`A Vdiameter equal to that bre of thecartridge.

intended to serve permitthe best propagation of ther i gnited gases n ofther-cap-a'nd thezintegrallzignition of all the elements'bf powder,Aandto avoid unburnt ma- ,teral'- faja, jV Iy' v -r v j-'Thecap `chamberis reinforc the fmassloil the body, thereby ensuring rm-A '\nss`,`irrespectiveof the number of re-capping `operatio ns. f i l Thf ibase: orreinforcement' may be` assembled tothe case-by beading, screwingor -by any other4 10 j method. Thebody and the baseiarecalculated andtreated inV such a Vmanner that the base, at the place" where it f is;assembled 'with .thebody, that is to say,` at one endin the yregionA oftheA end offthep'owder chamber, andai: the other end in 'i5 the region`on the cap chamber, effects a Vreal binding of itstwo regions. LThepowder chamber is thus bound atboth end sgthereby. increasing its towhich it issl'ibjected.Y

comprising anypart 'of cardboard, felt or the like, is ^indeforrnable,and is entirely'p'rotected from theaction of moisture; Y .j `Ihe dangerof the rim being torn 01T -is eliminatedan d therim no longer bearsanystress'due 25V toftheifignitionof the'powdensnce it is completelyv`independent of the ,body of the casefand the .powder chamber.v :I

.- The Lbase andthe rim are .no longer inc'ontact with theu -gases:produced byfthe capuand fthe 30 powder, whereby rany danger of escapeof the gases is eliminated.

' The device in question providesfor the cap a Vchamber Vwhich forms onepiece with the body of the case and is reinforced by the binding of the35 base. The cap is held perfectly, no escape of gasA is possibleV andre-capping is effected in a perfectv manner, since the cap chamberremains intact indefinitely.

The powder chamber has a very small diameter- 40 Y optimum result, andthe volume of thepowder Y chamber is always constant, since the wad isal-Y ways stopped at the same place by the internal edandcomprised 5shoulder provided on the case. The cases thus provided may be re-chargedand re-capped a considerable number of times and practically cannot beworn out.l

It is obvious that this construction of cases is applicable to cases forother kinds of ammunition.

In Figure .2, at .l1 4is shown a cardboard tube suitably engaged byoneof its ends on the spherical or oval case 2 terminating in a neck 3 inwhich the cap is placed.

Over the lower end of sequently presses the wall of the vsaid tubeagainst the end of the case 2, while Aat 4theisame time it engages theneck 3 by a cylindrical part 6. Y Y

The case 2 constitutes thepowderichamber, and the cardboard tube'y willbe employed exclusively to contain the charge of shot. The base lensures the intimate fitting ofthe cardboard tube 11 with the metallcaseand ensures :perf ect gas-tightness, Furthermore,.thefhead -4presses the tube 11 on *the case :Zat lthe places which -aresnbjectedtor maximum fatigue, and thel fitting obviatespthedisadvantages; which would` result "from the variations nrliameterandthickness ofthe cardboard.

j The .upper-:.endjof Athe chamber' formed 'bythe' case 2 maybe madethinner in order to effectits l the outer part of saidnipple.

' :2. .Apartridge :casing comprismga tubulargshell including..agconoidal base partfforming thevpowder chamber :and a cylindricalextension of the ibase part 4forming thefshot schamber, fsaid base parthaving at its inner part a slightly :less cross-jarea .than that ofthecylindrical extension,.said base fpartterm-inating at its .conoidal-endinran Aoutthe tube 11 is flttedih Y `cylindrical reinforcement or basel,which conwardly projecting nipplea'dapted to receiveV a primer for thecartridge, and a cylindrical reinforcing' element seated on the conoidalbase part of the tubular shell with the periphery of said element flushwith the periphery of the cylindrical extensionrof thershell, saidreinforcing element having a headprovided with an inwardly provjectingannularflange seated on the-outer'part offsaid nipple. Y Y Y y 3. Acartridge casing comprising a tubular shell including a conoidal basepart forming the powder chamber and a cylindrical extension of the basepart forming the shot chamber, said base ,part terminating at itsconoidal end in an outwardly projecting nipple adapted to receive theprimer Y "for the Vcartridge andsald base vpart having its conoidal wallgradually increasing in thickness from its inner edge toward itsconoidal end, and a `cylindrical. reinforcing element seated on thetubular shell over the conoidal base part thereof, said-element `'havingVa head provided with an inwardlyfprojecting annular flange seated'onthe oute'rpart of said nipple.

IfLVSA cartridge casing'comprising a tubular shell includinga conoidalbase part forming the powder `cliainb'enand a cylindricalextension ofthe base part forming :the shot chamber, the tubular shell having aninterior annular shoulder at theV junction of the base part with thecylindrical extension to form an abutment 4forthe wad inserted in theshell to separate the powder and ShOtchamberS; said :base-part*terminating at its conoidal end in 'an outwardly projecting nipple'adapted to receive'a primer and theinner'part of the ybase part havingslightly less cross-'area thanl that of the cylindrical extension, withthe vconoidal wall'of from the annular shoulder toward its conoidal end;and a cylindrical reinforcing element seated on the casing over theconoidal base partthe'reof VwithV the periphery Aof said element flushwith the v periphery of the cylindrical 'extension lofthev'casrreinforcing i y the V base part gradually Aincreasing inthickness k

